[time-nuts] 5370B Question / help needed

Thomas Allgeier th.allgeier at gmail.com
Sat Jul 1 18:16:53 EDT 2017

Yes, they are both set to "positive".  Leaving the start at "pos" and
switching the stop to "neg" gives 66 ns. One more observation, which
probably does make sense: If I set the ARming to +/-TI and toggle the
Period Complement the "sum" is always very close to 100ns: 15 is
complemented by -85 and 66 by -34. All this is for Trigger Levels at Preset.

When I "tune" the levels to get 100 ns at +TI and then switch to +/-TI I
get around 20 ps, and the Complement button has no effect on this.

On Sat, Jul 1, 2017 at 9:38 PM, Poul-Henning Kamp <phk at phk.freebsd.dk>

> --------
> In message <CAOT1cQJ4K8uyNvFp8AjoLGjd57Pm31LnZT_jRo44J4Zhesvgzg at mail.
> gmail.com>, Thomas Allgeier writes:
> >Going through the motions of measuring TI with it's own 10MHz ref as input
> >(as described in the manual) I don't get 100 ns, but around 15 ns. So this
> >is with the switch set to START COM. Oddly enough I get the same 15 ns
> with
> >the switch set to SEP, and going through a 6 ft cable between start and
> >stop.
> Have you checked the trigger polarities ?
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.

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